Specifications for Electrical Installations Underground Commercial Distribution (UCD) Installation and Responsibility Guide
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Electric Service Bulletin No. 759B – October 2018 Supplement to Specifications for Electrical Installations Underground Commercial Distribution (UCD) Installation and Responsibility Guide UNDERGROUND COMMERCIAL DISTRIBUTION (UCD) INSTALLATION AND RESPONSIBILITY GUIDE SUPPLEMENT TO SPECIFICATIONS FOR ELECTRICAL INSTALLATIONS ELECTRIC SYSTEM BULLETIN No. 759B 1 Liberty Utilities / Supplement to Specifications for Electrical Installations / ESB 759B, October 2018 TABLE OF CONTENT UCD Specifications and Installation Guide Acknowledgement (Job Spec/SignoffForms)…..……3 1.0 Scope ................................................................................................................................ 8 2.0 General Requirements ..................................................................................................... 8 3.0 Type of Service ................................................................................................................. 8 4.0 Plans .................................................................................................................................. 9 5.0 Permits .............................................................................................................................. 9 6.0 Easements ...................................................................................................................... 10 7.0 Responsibility and Ownership ..................................................................................... .10 8.0 Transformer Clearance from a Building ...................................................................... 14 9.0 Transformer Clearance from Objects ........................................................................... 15 10.0 Transformer Accessibility ............................................................................................ 15 11.0 Transformer Mechanical Protection/Bollards ............................................................ 16 12.0 Transformer Pad ........................................................................................................... 17 13.0 Transformer Secondary ................................................................................................ 17 13.1 Transformer Secondary Connections ......................................................................... 19 13.2 Secondary Bolt Assembly ............................................................................................ 19 13.2 Secondary Splice Box .................................................................................................. 20 14.0 Transformer Sweep Entry ............................................................................................ 20 15.0 Transformer Ground Grid and Bonding ...................................................................... 20 16.0 Transformer Oil Containment ...................................................................................... 22 17.0 Riser Pole ....................................................................................................................... 24 18.0 Heavy Duty Handhole ................................................................................................... 25 19.0 Primary Cable Pull/Splice Box ..................................................................................... 26 20.0 Trench Requirements ................................................................................................... 27 20.0.1 Typical Trenches ........................................................................................................ 28 21.0 Conduit Requirements .................................................................................................. 29 21.1 Pulling Tape ................................................................................................................... 30 21.2 Trench and Conduit System Inspection ..................................................................... 30 22.0 Primary Cable, Conduit System, and Electrical Equipment ...................................... 30 23.0 Secondary Cable and Conduit System ....................................................................... 30 24.0 Metering ......................................................................................................................... 31 25.0 Manhole .......................................................................................................................... 31 25.1 Manhole Frame, Ring and Cover ................................................................................. 32 25.2 Switchgear Manhole ..................................................................................................... 33 25.3 Switchgear Manhole Ground Grid ............................................................................... 36 25.4 Switchgear Manhole Bollard Layout ........................................................................... 37 26.0 Switchgear Fiberglass Base with Conduit Entry’s .................................................... 38 26.1 Switchgear Fiberglass Base Ground Grid .................................................................. 39 26.2 Switchgear Fiberglass Boxpad Bollard Layout .......................................................... 40 26.3 Sectionalizing Cabinets - Three Phase and Single Phase Applications…………….41 27.0 Transformer Pad Specifications .................................................................................. 42 28.0 Sample Installations ..................................................................................................... 46 29.0 Bollard Detail ................................................................................................................. 50 30.0 Concrete Specifications ............................................................................................... 51 31.0 Easement Applications ................................................................................................ 55 32.0 Approved Precast Concrete Manufacturers ............................................................... 57 33.0 Approved Materials – Underground Commercial Installations................................. 58 Liberty Utilities / Supplement to Specifications for Electrical Installations / ESB 759B, October 2018 34.0 Other Material/Suppliers ............................................................................................... 60 35.0 Job Check-off Sheet ..................................................................................................... 61 36.0 Cable Installation Maximum Pull Chart ....................................................................... 63 37.0 Padmount Transformer Compartment Sealing Requirement ................................... 64 38.0 Revision History ............................................................................................................ 65 3 For the latest authorized version, please refer to the company’s website at http://www.libertyutilities.com/electricalspecifications Liberty Utilities / Supplement to Specifications for Electrical Installations / ESB 759B, October 2018 UCD/URD Specifications and Installation Guide Acknowledgement (Job Spec/Signoff Forms) The requirements and specifications outlined in this guide book must be strictly followed. Any requirements not adhered to can pose safety problems, can be detrimental to the installed system and must be corrected before final acceptance. The Customer will bear full cost to make corrections to sub-standard installations. The Customer is responsible to provide enough lead time for the Company to design job, provide inspections and install Company equipment where applicable. Typical lead times are shown below. Lead-Time Notes Design and Layout Eight weeks Company receives all required plans, load data and easement information Trench, Conduit and Equipment Inspection Three days Company inspector Company Installation Four weeks After all inspections are approved and permits/ easements are procured Material Pick up (If required) 10 Days Company inspector NOTE: The above times are estimates only. Project Title ______________________________________________________________________________ Location _________________________________________________________________________________ Owner/Developer __________________________________________________________________________ Customer’s Representative _____________________________________ Date _______________________ Company Representative _______________________________________ Date _______________________ Company’s Copy 4 For the latest authorized version, please refer to the company’s website at http://www.libertyutilities.com/electricalspecifications Liberty Utilities / Supplement to Specifications for Electrical Installations / ESB 759B, October 2018 5 For the latest authorized version, please refer to the company’s website at http://www.libertyutilities.com/electricalspecifications Liberty Utilities / Supplement to Specifications for Electrical Installations / ESB 759B, October 2018 UCD/URD Specifications and Installation Guide Acknowledgement (Job Spec/Signoff Forms) The requirements and specifications outlined in this guide book must be strictly followed. Any requirements not adhered to can pose safety problems, can be detrimental to the installed system and must be corrected before final acceptance. The Customer will bear full cost to make corrections to sub-standard installations. The Customer is responsible to provide